L68B2 Mast Section When using tower crane, the most easy to ignore several issues
tower crane is a large-scale machinery, in its installation, use, dismantle the attention to the problem more. The Tower Crane Plant says for you, when using tower crane, the most easy to ignore several problems: 1, the standard section should be inserted to use, the bottom section of Tower Crane Standard Section Foundation section or reinforced section except the maximum force, if the same standard section is installed in the bottom part for a long time, it will lead to fatigue damage or damage. The correct approach should be: every time the assembly and disassembly, the other standard section inserted alternate use at the bottom, avoid the same standard section always at the bottom. Many people fail to notice that the tower crane is at the lowest height when it is disassembled or assembled. There are three standard sections in the frame which are always at the bottom of the tower crane. 2, the standard section connecting bolt replacement in time, if the bolt corrosion serious, screw surface rust pit did not occur to replace and still in use, serious violation of high strength connecting bolt use requirements, tower crane Factor of safety will be greatly discounted. In general, Standard Section Connection Bolts are fitted with plain washers to increase the force bearing area of the connecting sleeve and to protect the surface of the connecting sleeve from grinder damage.
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The hardness of the flat Washer is very high, individual disassemblers remove the flat Washer at will during the operation, which directly causes the surface scratch of the connecting sleeve, affects the pre-tightening force, increases the local pressure of the connecting sleeve and changes the force uniformity of the connecting sleeve. 3, the tower crane location slope stability calculation, the tower crane must be placed in the Arrowhead base groove, no other reliable slope protection measures must be carried out slope stability calculation, whether placed on the base groove or the bottom edge. Once the tower crane is installed, the construction cycle is less about 2 months, more cross-year. During this period, if there are problems in the slope due to vibration and rain, it will affect the safety of tower crane. The calculation method of slope stability: the Taylor method or the ferenius method is usually used to determine the critical sliding Fox method for cohesive soil, and the linear fracture surface method is usually used for sandy soil.
L68B2 mast section is the best in this field
